Improves the back button behaviour during manual login

[joashrajin]

Fixes the way the back button works on the password login page

Fix

Fixes the way the back button works on the password login page

Addresses #1751

Before	After
1000107753.mp4	Screen_Recording_20251023_145640_Simplenote.mp4

Test

1. Log out of the app if already logged in
2. On the app homescreen, press 'Log In'
3. Click then on 'log in manually'
4. Press the back arrow on the top of the screen, or use Android gestures/back navigation button to go back
5. Notice it will now take you back to the log in page, instead of the homepage

Review

Please verify if the manual login functionality works as expected after actually logging in. I can't test this since I do not have a Simperium staging account to confirm what happens after logging in.

Release

Issue #1751: Back button navigation during manual login

[mzorz]

Works well @joashrajin ! I'll create a dummy PR to be able to merge your trunk branch into the main repo's trunk

[joashrajin]

Woohoo! Thanks Mario :))